When former Vice President Joe Biden commented Sunday night on the weekend's mass-shootings that killed 29 people, he misstated where in the United States they had taken place.

Biden, 76, referred to the rifle massacres as 'the tragic events in Houston today and also in Michigan the day before.' The carnage unfolded Saturday in El Paso, Texas and in the early hours of Sunday morning in Dayton, Ohio.

The Democratic presidential front-runner was speaking to a group of about 75 donors at a high-dollar fundraiser in San Diego.

Sunday night's event took place at the home of businessman Mark Arabo, an advocate for persecuted Iraqi Christians.

El Paso police arrested Patrick Crusius, 21, after the first shooting in a Wal-Mart store. In addition to killing 20, Crusius is accused of wounding 26 others.

Twenty-four-year-old Connor Betts mowed down nine people and injured 26 more at a popular Dayton restaurant hours later.